JP2020147986A - Connection structure of building unit - Google Patents

Abstract

To make it possible mainly to suppress a problem of strength decrease which easily occur in an offset portion when disposing a lower floor building unit and an upper floor building unit so as to be offset.SOLUTION: Building units 2, 3 include a unit frame 7 with a box rigid-frame structure in which upper ends of four columns 4 are connected in a rectangular shape by four ceiling beams 5 and lower ends of the four columns 4 are connected in a rectangular shape by four floor beams 6. A unit building 1 is constituted when an upper floor building unit 3 is disposed on a lower floor building unit 2 in a state where at least one side is offset (an offset portion 21). There, facing ceiling beams 5 of neighboring lower floor building units 2 are connected by a first connection portion 22 below a column 4 provided at one side of the upper floor building unit 3.SELECTED DRAWING: Figure 4

Description

The present invention relates to a connecting structure of building units.

Buildings such as houses include unit buildings constructed by the unit construction method. The unit building is such that a building unit manufactured in advance at a factory is transported to a construction site and assembled at the construction site so that the building can be constructed in a short period of time (see, for example, Patent Document 1). ..

Japanese Unexamined Patent Publication No. 2005-351609

In the unit building, for example, it is common to stack building units of the same size in the vertical direction and connect them to each other. As a result, the positions of the columns on the lower floor and the positions of the columns on the upper floor are matched, so it is easy to secure the strength of the building by connecting the pillars on the lower floor and the pillars on the upper floor. ..

On the other hand, it is conceivable to arrange the upper floor building unit in an offset state on the lower floor building unit, but in this way, the position of the lower floor pillar and the upper floor pillar at the offset part Since the position of the building does not match, it becomes impossible to connect the pillars on the lower floor and the pillars on the upper floor at that part, and it becomes difficult to secure the strength of the building.

Therefore, an object of the present invention is mainly to solve the above-mentioned problems.

In order to solve the above problems, the present invention
A building unit with a box rigid frame structure, in which the upper ends of the four pillars are connected in a rectangular shape by four ceiling beams and the lower ends of the four pillars are connected in a rectangular shape by four floor beams, is horizontally connected. It is a connecting structure of building units that are arranged adjacent to each other in the direction and stacked in the vertical direction and connected to each other.
Above the building unit on the lower floor, the building unit on the upper floor is arranged with at least one side offset.
It is characterized in that, under the pillar provided on one side of the building unit on the upper floor, the ceiling beams facing each other of the building unit on the adjacent lower floor are connected by a first connecting portion. To do.

According to the present invention, according to the above configuration, it is possible to suppress a decrease in strength of the offset portion when the building unit on the lower floor and the building unit on the upper floor are arranged in an offset manner.

It is a perspective view of the unit building which concerns on this embodiment. It is a perspective view of the building unit (unit frame) of FIG. It is a (disassembled) perspective view which shows the offset part of the unit building of FIG. It is a (disassembled) perspective view which shows the outline of the connection structure with respect to the offset part of FIG. It is a top view which shows the ceiling part of the lower floor and the floor part of the upper floor to which the connection structure of the unit building is applied. FIG. 5 is a side view of FIG. 5 showing the first connecting portion as viewed from the AA direction. FIG. 5 is a side view of FIG. 5 as viewed from the BB direction, showing the first connecting portion. It is a perspective view of the ceiling beam of FIG. It is the same side view as FIG. 6 which shows the 2nd connecting part. It is the same side view as FIG. 7 which shows the 2nd connecting part. 9 is a schematic exploded perspective view showing a state around the second connecting portion of FIGS. 9 and 10. It is the same side view as FIG. 6 which shows the 3rd connection part. It is the same side view as FIG. 7 which shows the 3rd connection part. It is a vertical sectional view of the offset part of the unit building which concerns on a comparative example. FIG. 6 is a vertical cross-sectional view showing a state in which a lateral force is applied to the unit building of FIG. It is a top view which showed the structure of the lower floor and the upper floor of the unit building provided with the connection structure which concerns on this Example, respectively, (a) is a floor plan, (b) is an allocation view of a building unit.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 16 are for explaining this embodiment.

<Structure> The configuration will be described below.

As shown in FIG. 1, a building such as a house is a unit building 1 constructed by a unit construction method. The unit building 1 is such that a building can be constructed in a short period of time by transporting building units 2 and 3 manufactured in advance at a factory to a construction site and assembling them at the construction site.

In the building units 2 and 3, as shown in FIG. 2, the upper ends of the four metal columns 4 are connected in a rectangular shape by the four metal ceiling beams 5, and the lower ends of the four columns 4 are connected to each other. It is a steel frame system having a unit frame 7 having a box rigid frame structure in which four metal floor beams 6 are connected in a rectangular shape.

A joint piece 8 is used to connect the pillar 4 to the ceiling beam 5 and the floor beam 6. The joint piece 8 is fixed to the upper end and the lower end of the pillar 4 by welding or the like.

The four ceiling beams 5 and the four floor beams 6 having a substantially rectangular shape in a plan view are configured to have a pair of long sides and a pair of short sides, respectively. Then, a ceiling joist 11 is erected between the pair of ceiling beams 5. Further, a floor beam 12 is erected between the pair of floor beams 6. The ceiling joists 11 and the floor beams 12 have short sides (short sides) with respect to the ceiling beams 5 and the floor beams 6 which are the long sides of the unit frame 7 (extending in the long side direction 13 (girder direction)). It is provided parallel to the ceiling beam 5 and the floor beam 6 (extending in the direction 14 (the end direction)).

Such building units 2 and 3 are arranged adjacent to each other in the horizontal direction 15 (long side direction 13 and short side direction 14), and are stacked and arranged in the vertical direction 16 to be connected to each other. As a result, the building becomes a multi-story unit building 1 having a lower floor and an upper floor.

At this time, the building unit 2 on the lower floor and the building unit 3 on the upper floor are laminated in the vertical direction 16 by aligning the positions of the pillars 4, and the pillar 4 or the portion of the joint piece 8 around the pillar 4 is vertically arranged. It is generally connected to 16. A connecting tool 17 (FIG. 3) such as a connecting bolt or nut is used to connect the building unit 2 on the lower floor and the building unit 3 on the upper floor.

If the unit building 1 has two floors, the lower floor will be the first floor and the upper floor will be the second floor. When the unit building 1 has three or more floors, the lower floor and the upper floor are relative.

(1) As shown in FIG. 3, the upper floor building unit 3 is arranged on the lower floor building unit 2 with at least one side offset (offset portion 21).
Then, as shown in FIGS. 4 (to 7), under the pillar 4 provided on one side of the building unit 3 on the upper floor, between the ceiling beams 5 facing each other of the adjacent building unit 2 on the lower floor. Is connected by the first connecting portion 22.

Here, the offset portion 21 sets the position of one side of the building unit 3 on the upper floor and the position of one side of the building unit 2 on the lower floor located below the position on the long side of the building units 2 and 3. It is formed by placing it at a different position in the direction 13 or the short side direction 14. As shown in FIG. 1, another building unit 3a on the upper floor can be installed on one side of the offset-arranged building unit 3 on the upper floor so as to be continuous in the long side direction 13. Further, on one side of the building unit 2 on the lower floor, another building unit 2a on the lower floor can be installed so as to be continuous in the long side direction 13.

The position on the other side of the building unit 3 on the upper floor and the position on the other side of the building unit 2 on the lower floor located below the offset may or may not be offset.

As shown in FIG. 8, the ceiling beam 5 includes a web portion 5a extending in the vertical direction 16 and an upper and lower flange portions 5b extending substantially horizontally from the upper and lower ends of the web portion 5a toward the inside of the building units 2 and 3. It is a member having a substantially C-shaped cross section having 5c.

Then, as shown in FIG. 7, the first connecting portion 22 connects (directly) the web portions 5a of the adjacent ceiling beams 5 of the adjacent lower floor building units 2 in the direction perpendicular to the plane. Fastening fixtures such as bolts and nuts can be used for the first connecting portion 22. The connecting direction by the first connecting portion 22 is the direction adjacent to the building unit 2 on the lower floor, and in this case, the parallel ceiling beams 5 facing each other of the building unit 2 on the lower floor adjacent to the short side direction 14 are connected. Therefore, the connecting direction is the short side direction 14.

In this embodiment, a plurality of first connecting portions 22 are installed at positions substantially directly below the pillar 4 on one side of the building unit 3 on the upper floor, separated by the vertical direction 16. The first connecting portion 22 may be singular.

Further, as shown in FIG. 6, the same applies to the position substantially directly below the pillar 4 of another upper floor building unit 3a installed on one side of the offset-arranged upper floor building unit 3. The first connecting portion 22 may be installed between the opposing parallel ceiling beams 5 of the adjacent lower floor building units 2.

At this time, as shown in FIG. 8, the web portion 5a and the upper and lower flange portions 5b and 5c are connected to the periphery (both side portions and the like) of the first connecting portion 22 inside the ceiling beam 5. As described above, a reinforcing plate 25 such as a stiffener having a vertical surface may be reinforced by attaching it by welding or the like.

Further, although not particularly shown, a spacer having a vertical surface or the like is interposed in the gap between the web portions 5a of the ceiling beams 5 facing each other at the offset portion 21 of the adjacent building unit 3 on the upper floor, if necessary. You may. This spacer is integrated with a horizontal spacer or the like interposed between the lower end of the pillar 4 of the building unit 3 on the upper floor and the upper flanges 5b and 5c of the ceiling beam 5 of the building unit 2 on the lower floor. You may let me. This spacer is similar to the pacer 35 (FIG. 11) described later.

(2) As shown in FIGS. 4 and 9 (to 11), the floor beams 6 facing each other on one side of the adjacent building unit 3 on the upper floor may be connected by the second connecting portion 31. ..

Here, as shown in FIG. 11, the floor beam 6 has a web portion 6a extending in the vertical direction 16 and upper and lower flanges extending substantially horizontally from the upper and lower ends of the web portion 6a toward the inside of the building units 2 and 3. It is a member having a substantially C-shaped cross section having portions 6b and 6c.

Then, the second connecting portion 31 connects (directly) between the web portions 6a of the facing floor beams 6 of the adjacent building units 3 on the upper floor in the direction perpendicular to the plane. Fastening fixtures such as bolts and nuts can be used for the second connecting portion 31. The connecting direction by the second connecting portion 31 is the direction adjacent to the building unit 3 on the upper floor, and in this case, the parallel floor beams 6 of the building unit 3 on the upper floor adjacent to the short side direction 14 are connected. Therefore, the connecting direction is the short side direction 14.

In this embodiment, one or more second connecting portions 31 are installed at positions in the joint piece 8. The joint piece 8 is a member having a substantially C-shaped cross section having a web portion extending in the vertical direction 16 and upper and lower flange portions extending substantially horizontally from the upper and lower ends of the web portion toward the inside of the building units 2 and 3. It is said that. The joint piece 8 having a substantially C-shaped cross section has a size capable of internally fitting the ends of the ceiling beam 5 and the floor beam 6. The joint piece 8 and the ceiling beam 5 and the floor beam 6 are joined or fixed to each other by welding, bolt fixing, or the like. Therefore, the strength inside the joint piece 8 is high.

Further, as shown in FIG. 9, the position in the joint piece 8 of another upper floor building unit 3a installed on one side of the offset-arranged upper floor building unit 3 is also adjacent to the position in the same manner. A second connecting portion 31 may be installed between the opposing parallel floor beams 6 of another upper floor building unit 3a.

At this time, as shown in FIG. 11, a spacer 35 or the like may be interposed between the web portions 6a of the floor beams 6 facing each other, if necessary. In this embodiment, the spacer 35 is bent substantially horizontally from the vertical surface portion 35a arranged to abut on the back surface side of the joint piece 8 and the upper edge portion of the vertical surface portion 35a, and can be locked to the upper surface of the joint piece 8. It has a horizontal surface portion 35b for preventing falling, and has a substantially L-shaped cross section in a side view as a whole. The spacer 35 can be installed for each of the adjacent building units 3 on the upper floor.

(3) As shown in FIGS. 4 and 12 (FIG. 13), the pillars 4 facing each other on one side of the adjacent building units 3 on the upper floor may be connected by a third connecting portion 41.

Here, the pillar 4 has a prismatic shape as shown in FIG. 11, and the third connecting portion 41 is a surface 4a in which the facing pillars 4 are substantially flush with each other as shown in FIG. It has a connecting plate 42 erected between them, and a fastening fixture 43 such as bolts and nuts for fixing the connecting plate 42 to each pillar 4. The third connecting portion 41 is preferably attached to the inward facing surface 4a of the building unit 3 on the upper floor.

In this case, since the opposing columns 4 of the building unit 3 on the upper floor adjacent to the short side direction 14 are connected, the connecting direction is the short side direction 14, but the fastening fixture of the third connecting portion 41 The 43 is attached in a direction orthogonal to the first connecting portion 22 and the second connecting portion 31 (in this case, the long side direction 13).

The third connecting portion 41 is preferably installed near the lower end of the pillar 4, for example, at a position immediately above the joint piece 8.

Further, as shown in FIG. 12, the position of the pillar 4 of another upper floor building unit 3a installed on one side of the offset-arranged upper floor building unit 3 is similarly adjacent to another. A third connecting portion 41 may be installed between the opposing pillars 4 of the building unit 3a on the upper floor.

The configurations (1), (2), and (3) described above may be used alone or in combination as appropriate.

<Action> The action of this example will be described below.

Generally, in the unit building 1, the building unit 2 on the lower floor secures the strength as a building by being connected to a foundation having high rigidity. Further, the building unit 3 on the upper floor is connected to the pillar 4 of the building unit 2 on the lower floor located directly below to secure the strength as a building.

On the other hand, as shown in FIG. 3, when the building unit 2 on the lower floor and the building unit 3 on the upper floor are offsetly arranged, as shown in FIG. 14, one of the building units 3 on the upper floor is placed in the offset portion 21. Since there is a portion on the side (offset portion 21) that cannot be connected to the pillar 4 of the building unit 2 on the lower floor located directly below, the building unit 3 on the upper floor secures the strength as a building at the offset portion 21. Becomes difficult.

Therefore, as shown in FIG. 15, when a lateral force F acts on the unit building 1 due to an earthquake or the like, the building unit 2 on the lower floor is individually deformed, and the building unit 3 on the upper floor is individually displaced significantly. Therefore, a step 51 may be formed between the ceilings of the building units 2 on the lower floors arranged adjacent to each other, and a problem such as tearing of the wallpaper attached to the ceiling or the like may occur at the step 51.

<Effect> According to this embodiment, the following effects can be obtained.

(Effect 1) The building unit 3 on the upper floor may be arranged on the building unit 2 on the lower floor with at least one side offset. As a result, it is not necessary to forcibly align the lower floor building unit 2 and the upper floor building unit 3 to the same size, so that the building units 2 and 3 having different sizes can be stacked and arranged. Therefore, for example, for the building unit 2 on the lower floor and the building unit 3 on the upper floor, it is possible to use different sizes suitable for the floor plan of the lower floor and the floor plan of the upper floor. As shown in FIG. 16, by matching the floor plan (FIG. 16 (a)) with the sizes of the building units 2 and 3 (FIG. 16 (b)), the configuration of the unit building 1 can be rationalized and the cost can be reduced. Can be planned.

Here, if the building unit 2 on the lower floor and the building unit 3 on the upper floor have different sizes, as described above, the pillar 4 provided on one side (offset portion 21) of the building unit 3 on the upper floor. The pillar 4 of the building unit 2 on the lower floor does not exist on the lower side. Therefore, it becomes difficult to secure the strength of the building at the offset portion 21 (the peripheral portion of the pillar 4 on one side).

Therefore, on the lower side of the pillar 4 provided on one side of the building unit 3 on the upper floor, the adjacent ceiling beams 5 of the building unit 2 on the lower floor are connected by the first connecting portion 22. I made it. As a result, even if there is no pillar 4 of the building unit 2 on the lower floor under the pillar 4 on one side of the building unit 3 on the upper floor, the ceiling beams 5 facing each other of the adjacent building unit 2 on the lower floor By connecting the spaces, the adjacent building units 2 on the lower floors are partially directly connected to each other, so that the strength of the offset portion 21 of the building can be increased.

In addition, it is suppressed that the building unit 2 on the lower floor is individually deformed or the building unit 3 on the upper floor is individually displaced in response to rolling such as an earthquake, and the adjacent building unit 2 on the lower floor is suppressed. It is possible to prevent a step 51 from being formed between the ceilings of the building, and to prevent problems such as tearing of the wallpaper attached to the ceiling or the like.

Therefore, it is possible to suppress and solve the problem of strength decrease that tends to occur when the building unit 2 on the lower floor and the building unit 3 on the upper floor are offset.

(Effect 2) On one side of the adjacent building unit 3 on the upper floor, the floor beams 6 facing each other may be connected by a second connecting portion 31. As a result, even if there is no pillar 4 of the building unit 2 on the lower floor, the pillar 4 on one side of the building unit 3 on the upper floor faces each other on one side of the adjacent building unit 3 on the upper floor. By connecting the existing floor beams 6, the adjacent building units 3 on the upper floors are partially directly connected to each other, so that the strength of the offset portion 21 of the building can be increased.

Further, by keeping the floor of the adjacent building unit 3 on the upper floor flush with the rolling motion such as an earthquake, it is possible to prevent a step 51 from being formed between the ceilings of the building unit 2 on the lower floor. It is possible to prevent problems such as tearing of the wallpaper attached to the ceiling.

Therefore, it is possible to suppress and solve the problem of strength decrease that tends to occur when the building unit 2 on the lower floor and the building unit 3 on the upper floor are offset.

(Effect 3) On one side of the adjacent building unit 3 on the upper floor, the opposing pillars 4 may be connected by a third connecting portion 41. As a result, even if there is no pillar 4 of the building unit 2 on the lower floor, the pillar 4 on one side of the building unit 3 on the upper floor faces each other on one side of the adjacent building unit 3 on the upper floor. By connecting the pillars 4 to each other, the adjacent building units 3 on the upper floors are partially directly connected to each other, so that the strength of the offset portion 21 of the building can be increased.

Further, since the positions of the opposing pillars 4 of the adjacent building units 3 on the upper floor do not shift in the vertical direction 16 due to rolling motion such as an earthquake, a step 51 is formed between the ceilings of the building unit 2 on the lower floor. It is possible to prevent problems such as tearing of the wallpaper attached to the ceiling.

Therefore, it is possible to suppress and solve the problem of strength decrease that tends to occur when the building unit 2 on the lower floor and the building unit 3 on the upper floor are offset.

Connection direction 1 Unit building 2 Building unit 3 Building unit 4 Pillar 5 Ceiling beam 6 Floor beam 15 Horizontal direction 16 Vertical direction 21 Offset part 22 First connection part 31 Second connection part 41 Third connection part

Claims (3)

A building unit with a box rigid frame structure, in which the upper ends of the four pillars are connected in a rectangular shape by four ceiling beams and the lower ends of the four pillars are connected in a rectangular shape by four floor beams, is horizontally connected. It is a connecting structure of building units that are arranged adjacent to each other in the direction and stacked in the vertical direction and connected to each other.
Above the building unit on the lower floor, the building unit on the upper floor is arranged with at least one side offset.
It is characterized in that, under the pillar provided on one side of the building unit on the upper floor, the ceiling beams facing each other of the building unit on the adjacent lower floor are connected by a first connecting portion. Connecting structure of building units. A building unit with a box rigid frame structure, in which the upper ends of the four pillars are connected in a rectangular shape by four ceiling beams and the lower ends of the four pillars are connected in a rectangular shape by four floor beams, is horizontally connected. It is a connecting structure of building units that are arranged adjacent to each other in the direction and stacked in the vertical direction and connected to each other.
Above the building unit on the lower floor, the building unit on the upper floor is arranged with at least one side offset.
A connecting structure of a building unit, characterized in that, on one side of the building unit on an adjacent upper floor, the floor beams facing each other are connected by a second connecting portion. A building unit with a box rigid frame structure, in which the upper ends of four pillars are connected in a rectangular shape by four ceiling beams and the lower ends of the four pillars are connected in a rectangular shape by four floor beams, is horizontally connected. It is a connecting structure of building units that are arranged adjacent to each other in the direction and stacked in the vertical direction and connected to each other.
Above the building unit on the lower floor, the building unit on the upper floor is arranged with at least one side offset.
A connecting structure of a building unit, characterized in that, on one side of the building unit on an adjacent upper floor, the pillars facing each other are connected by a third connecting portion.